Illinois: Cook County Delays 2024 Property Tax Bills—What It Means and How Ryan Can Help

The delay is the result of Cook County’s multiyear effort to modernize its property tax system. The new platform, developed by Tyler Technologies, replaces legacy systems used by the Assessor, Board of Review, Clerk, and Treasurer.

Originally expected to be completed in 2019, the system officially launched in April 2025. However, technical setbacks and reporting failures have delayed the delivery of critical data to the Illinois Department of Revenue, which must certify key figures before bills can be issued.

Implications for Property Owners and Local Governments

More than $8 billion in tax revenue is now on hold. An additional $216 million in distributions to taxing bodies and $56 million in refunds to property owners have also been delayed. These disruptions are placing added pressure on municipal budgets, including the City of Chicago’s projected $1 billion budget shortfall. With the triennial reassessment now in effect, many property owners are at risk of overpaying without proper review and preparation.

Ryan Can Help

As this situation evolves, Ryan is actively supporting clients across sectors by offering:

• Reassessment reviews to identify potential overvaluations
• Forecasting models to assess delayed payments and their financial impact
• Appeals management to pursue fair outcomes based on current valuations
• Clear communication strategies to support internal and external stakeholders

Take Action Early

Cook County has launched a public progress tracker to report on the system modernization, but visibility alone is not enough to manage the financial implications. To stay ahead of billing delays and reassessment-driven increases, contact Ryan’s Property Tax team for strategic guidance and support.